【发布时间】：2017-11-27 12:34:16
【问题描述】：
如果以前有人问过这个问题，我很抱歉，我找不到它。我是初学者，我一直在尝试设置 webpack，以便开始学习 react。按照 youtube 上的教程后，我已经安装了 react with
npm install --save react react-dom
还尝试使用
启用 ES6 和 JSXnpm install --save-dev babel-cli babel-preset-react
npm install babel-preset-env --save-dev
在尝试运行 dev 时，我收到以下错误：
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! webpack-starter@1.0.0 dev: `webpack-dev-server`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the webpack-starter@1.0.0 dev script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
这是我的 webpack.config.js
var HtmlWebpackPlugin = require('html-webpack-plugin');
const ExtractTextPlugin = require("extract-text-webpack-plugin");
var path = require("path");
module.exports = {
entry: './src/app.js',
output: {
path: path.resolve(__dirname, "dist"),
filename: 'app.bundle.js'
},
devServer: {
contentBase: path.join(__dirname, "dist"),
compress: true,
stats: "errors-only",
open: true,
openPage: ''
},
module: {
rules: [
{test: /\.scss$/, use: ExtractTextPlugin.extract({fallback: 'style-loader', use: ['css-loader', 'sass-loader']})},
]
},
plugins: [
new HtmlWebpackPlugin({
title: 'Project Demo',
minify: {
collapseWhitespace: false // For minifying HTML to save on space
},
hash: false, // Name of app.bundle.js is changing to see if we're uploading the latest files
template: './src/index.html', // Load a custom template (ejs by default see the FAQ for details)
}),
new ExtractTextPlugin("app.css"),
]
}
我还在 src 文件夹中创建了 .babelrc。它包含以下内容：
{
"presets": ["es2015", "react"]
}
在安装以上所有这些时，我得到的唯一警告是
npm WARN webpack-dev-server@2.5.0 需要 webpack@^2.2.0 的 peer 但没有安装。您必须自己安装对等依赖项。
但如果我理解正确，这不是错误，只是警告。意思是，一切都应该仍然有效。我错了吗？
有人可以告诉我发生了什么吗？我怎样才能解决这个问题？ 谢谢！
编辑：这也是我的 package.json：
{
"name": "webpack-starter",
"version": "1.0.0",
"description": "Webpack project starter",
"main": "index.js",
"scripts": {
"dev": "webpack-dev-server",
"prod": "webpack -p"
},
"author": "Name",
"license": "ISC",
"devDependencies": {
"babel": "^6.23.0",
"babel-cli": "^6.26.0",
"babel-core": "^6.26.0",
"babel-loader": "^7.1.2",
"babel-preset-env": "^1.6.1",
"babel-preset-es2015": "^6.24.1",
"babel-preset-es2015-webpack": "^6.4.3",
"babel-preset-react": "^6.24.1",
"css-loader": "^0.28.7",
"extract-text-webpack-plugin": "^3.0.1",
"html-webpack-plugin": "^2.30.1",
"node-sass": "^4.5.3",
"react": "^16.1.1",
"react-dom": "^16.1.1",
"sass-loader": "^6.0.6",
"style-loader": "^0.19.0",
"webpack": "^3.8.1",
"webpack-dev-server": "^2.9.4"
},
"dependencies": {}
}
【问题讨论】：
-
你安装 webpack 了吗？
-
@fshock 是的，我刚刚运行了“npm view webpack version”，它告诉我我安装了 3.8.1 版。
-
在您的装载机中添加
loader: "babel-loader"，因为目前我看不到任何babel-loader -
npm view webpack version将仅显示可从注册表下载的最新 webpack。它不会显示已安装的版本。如果你想验证在你的 package.json 中检查 webpack 的条目，你需要安装 webpack，比如npm install --save-dev webpack -
尝试在本地运行
npm view webpack version而不是webpack -v
标签： reactjs webpack webpack-dev-server